linux-kernel - Re: [PATCH 2/3] ASoC: lpass-platform: Fix broken pcm data usage

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Message-ID: <20161029161401.GB24622@kwestfie-linux.qualcomm.com>
Date:   Sat, 29 Oct 2016 09:14:01 -0700
From:   Kenneth Westfield <kwestfie@...eaurora.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     Mark Brown <broonie@...nel.org>, alsa-devel@...a-project.org,
        Banajit Goswami <bgoswami@...eaurora.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, linux-kernel@...r.kernel.org,
        Kenneth Westfield <kwestfie@...eaurora.org>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Subject: Re: [PATCH 2/3] ASoC: lpass-platform: Fix broken pcm data usage

On Fri, Oct 28, 2016 at 04:32:19PM +0100, Srinivas Kandagatla wrote:
> This patch fixes lpass-platform driver which was broken in v4.9-rc1.
> lpass_pcm_data data structure holds information specific to stream.
> Holding a single private pointer to it in global lpass_data
> will not work, because it would be overwritten by for each pcm instance.
> 
> This code was breaking playback when we have both playback and capture
> pcm streams, as playback settings are over written by capture settings.
> 
> Fix this by moving channel allocation logic out of pcm_new to pcm_open
> so that we can store the stream specific information private_data of
> snd_pcm_runtime.
> 
> Fixes: 6adcbdcd4b6e ("ASoC: lpass-platform: don't use snd_soc_pcm_set_drvdata()")
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> ---
>  sound/soc/qcom/lpass-platform.c | 151 ++++++++++++++++++----------------------
>  sound/soc/qcom/lpass.h          |   1 -
>  2 files changed, 67 insertions(+), 85 deletions(-)

After you address Mark's comments:

Acked-by: Kenneth Westfield <kwestfie@...eaurora.org>

-- 
Kenneth Westfield
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, 
a Linux Foundation Collaborative Project